Angular Correlation between Photoelectrons and Auger Electrons from K-Shell Ionization of Neon

Journal Article · Fri Jun 05 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.223001· OSTI ID:21322826

Landers, A L; Robicheaux, F; Bhandary, A ^[1]; Jahnke, T; Schoeffler, M; Titze, J; Akoury, D; Doerner, R ^[2]; Osipov, T; Lee, S Y; Adaniya, H; Hertlein, M; Weber, Th; Prior, M H; Belkacem, A ^[3]; Ranitovic, P; Bocharova, I; Cocke, C L ^[4]

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1. Auburn University, Auburn, Alabama, 36849 (United States)
2. Institut fuer Kernphysik, J. W. Goethe-Universitaet Frankfurt am Main, Max-von-Laue-Str. 1, D-60438 Frankfurt (Germany)
3. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
4. Kansas State University, Manhattan, Kansas, 66506 (United States)

We have used cold target recoil ion momentum spectroscopy to study the continuum correlation between the photoelectron of core-photoionized neon and the subsequent Auger electron. We observe a strong angular correlation between the two electrons. Classical trajectory Monte Carlo calculations agree quite well with the photoelectron energy distribution that is shifted due to the potential change associated with Auger decay. However, a striking discrepancy results in the distribution of the relative angle between Auger and photoelectron. The classical model predicts a shift in photoelectron flux away from the Auger emission direction, and the data strikingly reveal that the flux is lost rather than diverted, indicating that the two-step interpretation of photoionization followed by Auger emission is insufficient to fully describe the core-photoionization process.

• OSTI ID: 21322826
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR CORRELATION
AUGER EFFECT
ELECTRONS
EMISSION
ENERGY SPECTRA
IONS
K SHELL
MONTE CARLO METHOD
NEON
PHOTOIONIZATION
SPECTROSCOPY